Improvement in plow-beams



1. c. BUTT-ERFIYELD. Pl ow-Beams.

Patented May 5.1874.

W/TNEE 5 YR M,

4M Marowmummm Co. M x mm moms) UNITED STATES PATENT OFF CE] JOHN C.BUTTERFIELD, OF CHICAGO, ILLINOIS, ASSIGNOB TO HIMSELF AND BYRON C.BRADLEY, OF SAME PLACE.

IMPROVEMENT m PLOW-BEAMS.

Specification forming part of Letters Patent No. 150,524, dated May 5,1874 application filed February 7, 1874.

To all whom it mayconcern edges, like an ordinary girder, and do notclaim to have invented that form of plowbeam. Such beams require athickness of web which makes them objectionably heavy when sufficientlystrong to withstand. the strains to which they are subjected, saidstrains being combined flexion and torsion, and produrging a constanttendency to buckle in the we My invention is principally designed toremedy this defect in ordinary cast plowbeams, by combining, with acontinuous web and lateral flanges at the edges thereof, diagonaltruss-ribs, extending from one edge flange to the other, and the wholecast solid in one piece, whereby the web may be made very thin, and theaggregate weight very much re duced, while the mutual support offeredbythe continuous web lateral flanges and diagonal ribs, each to the.other, is such that the beam so constructed is enabled to withstand allthe strains to which it can be subjected equally well with the ordinarybeam of much greater weight. My invention therefore consists, first, ofa plow-beam constructed of a thin web, provided with flanges along eachedge, and extending laterally on either side thereof, and diagonaltruss-ribs extending from one flange to the other, and on each side ofsaid web, the whole cast solid in one piece; and,

second, in a beam constructed with thin web, lateral flanges, anddiagonal ribs, and provided with permanent seats for the attachment oftheland-side, mold-board, land-side handle, &c.

That others may more fully understand my invention, I will particularlydescribe it.

A is the web of my beam, made with an edgewise curve, as shown in Fig.1, to adapt it to the purposes of a plowbeam. Along each edge of saidweb are flanges D E, extending laterally on both sides thereof, anddiagonal truss-ribs B B extend across the web A, connecting the saidflanges D E on each side of the said web. The plow-beam is subjected tothe severest strain at or near the point B, and therefore the web A isgiven a greater width near that point than elsewhere. One of the objectsof my invention is to produce a metallic plow-beam as a separate articleof manufacture, to which the land-sides and moldboards of differentpatterns may be applied. To this end the rear portion of my plow-beam iscurved downward, and extended to the level of the bottom of theland-side, and is widened a little, as shown at P P. On one side it isprovided with a seat, and with holes for bolts to rigidly securetheland-side plate N. On the opposite side of the beam, at about theheight of the top of the mold-board, I form a lug, I, extendingobliquely outward and backward from the front edge of the beam, for theconvenient attachment of the mold-board K, a bolt, J, being used forthat purpose. I also provide a flanged seat, M, for the land-side handleL, the same being secured by bolts a n. At the front end of the beam Imake lateral and vertical extensions, as shown at F, Figs. 1 and 5, soas to receive a vertical slot, G, and a series of holes, H, througheither one of which a pin may be placed to adapt said slot to thepurposes of a clevis for the attachment and regulation of the draft. Theabovedescribed beam, constructed with web A, flanges D E, and truss-ribsB B, is cast in one piece, so that said parts are all homogeneouslyunited to and support each other.

After being cast, as described, I propose to submit my plow-beams to aprocess whereby the iron will be converted into steel, such as theprocess worked by the Jackson Steel Company, of Pittsburg, Pennsylvania.The strength of the beam is very greatly increased in proportion to itsweight by this conversion.

Having described my invention, what I claim as new is 1. A plow-beamhaving a web, A, lateral agonal truss-ribs B 13, all substantially as detially as described, as a new article of manuscribed, and made solid inone piece. I feature and trade. Y

2. A cast-metal plow-beam with a web A, flanges D E, diagonal ribs 13 B,permmient JOHN BUTTERFIDLD' elevis G, and seats for the permanent andWitnesses: ready attachment of the land-side, mold-board, G. L. CHAPIN,and. land-side handle, constructed substan- I. H. ELLIOTT.

